Nitric Oxide and Temperature Measurement Using Laser Absorption Spectroscopy in Arc-Heater Plenum

被引：0

作者：

Gessman, Isabella ^{[1
]}

Sub Lee, Gyu ^{[1
]}

Kato, Nozomu ^{[1
]}

Lee, Tonghun ^{[1
]}

Ghanekar, Shruti ^{[2
]}

Kim, Keunsoo ^{[3
]}

Yoo, Jihyung ^{[4
]}

机构：

[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

[2] UL Fire Safety Res Inst, Columbia, MD 21046 USA

[3] Korea Inst Sci & Technol KIST, Ctr Hydrogen & Fuel Cell Res, Seoul 02792, South Korea

[4] Hanyang Univ, Dept Automot Engn, Seoul 04763, South Korea

来源：

AIAA JOURNAL | 2024年

关键词：

Tunable Diode Laser Absorption Spectroscopy; Scramjet Engines; Thermodynamic Properties; Sensors; Flow Conditions; Quantum Cascade Lasers; Computational Modeling; AXISYMMETRICAL SCRAMJET;

D O I：

10.2514/1.J064257

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A mid-infrared tunable diode laser absorption spectroscopy (TDLAS) sensor to measure rovibrational temperature and nitric oxide (NO) mole fraction in the arc-heater plenum was developed and employed in the Arc Heated Combustion Tunnel-II (ACT-II) facility at the University of Illinois at Urbana-Champaign. From this study, TDLAS-inferred temperatures were found to differ from the conventional method to estimate temperature by over 13%. Chemical equilibrium simulations were performed at the TDLAS-inferred temperatures to understand how chemical relaxation timescales compare with plenum residence times. Results from this study show NO levels higher than equilibrium concentrations, with relaxation timescales that exceed plenum residence times. With insufficient time to reach equilibrium, elevated NO levels are expected to remain in the test gas and persist into the scramjet model.

引用

页数：8

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